#include <stdio.h>
main()
{
  int year, month, days;
  scanf("%d%d", &year, &month);
  switch (month) {
  case 1: case 3: case 5: case 7: case 8:
  case 10: case 12:
    days = 31;
    break;
  case 4: case 6: case 9: case 11:
    days = 30;
    break;
  case 2:
    if ((year % 400 == 0) || 
	(year % 4 == 0 && (year % 100 != 0)))
      days = 29;
    else
      days = 28;
    break;
  default:
    days = 0;
  }
  printf("%d\n", days);
}
